1378460191 has 2 divisors, whose sum is σ = 1378460192. Its totient is φ = 1378460190.

The previous prime is 1378460183. The next prime is 1378460231. The reversal of 1378460191 is 1910648731.

It is an a-pointer prime, because the next prime (1378460231) can be obtained adding 1378460191 to its sum of digits (40).

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1378460191 - 2³ = 1378460183 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1378460491) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 689230095 + 689230096.

It is an arithmetic number, because the mean of its divisors is an integer number (689230096).

Almost surely, 2^1378460191 is an apocalyptic number.

1378460191 is a deficient number, since it is larger than the sum of its proper divisors (1).

1378460191 is an equidigital number, since it uses as much as digits as its factorization.

1378460191 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 36288, while the sum is 40.

The square root of 1378460191 is about 37127.6203250356. The cubic root of 1378460191 is about 1112.9220391928.

The spelling of 1378460191 in words is "one billion, three hundred seventy-eight million, four hundred sixty thousand, one hundred ninety-one".